Actually, I do have a few pictures and video here:
http://www.monsterfishkeepers.com/forums/showthread.php?t=399753
The fish share the tank with a big Hoplarchus psittacus, another large male Atabapo sev, 2 Crenicichla lenticulata, and a Crenicichla saxatilis. There were also 2 male rotkeil sevs in the tank but I had to remove them because they were getting the crap beaten out of them. My Atabapo pair would attack them on the left side of the tank and my Lents would attack them on the right side, so they hung in the middle at the very top of the tank.
The pair has spawned every two weeks since I started that thread. Every time I siphon out the free-swimmers, they start fanning and defending the spawning site again and have eggs within days. They hold the fry fine in the community tank and actually defend them very well -- they usually last a week or two after free-swimming. My saxatilis pike is small and quick, and he's constantly darting in and gobbling up fy.
The fish spawn on the far left end of the tank but defend about 60 - 70% of it. My pikes, the psittacus, and the lone Atabapo sev cower at the far right side. Occasionally the pikes get brave and flare up at the pair, but the sevs are not afraid to attack any of the other fish. My psittacus was the meanest fish I owned until I got these guys, and now they have put him in his place.
I will say that this is my favorite severum that I've ever spawned, and I've spawned lots -- greens, gold, notatus. The parental care and the bond between the parents is really fun to watch.
I also have a true H. severus pair from the Orinoco. There are subtle differences in their appearance but they're definitely different than my Atabapos. They are still small, about 5", but they spawned last week. I now have two female mouthbrooder sevs holding eggs in two separate tanks.